Surface-gage.



nu. 649,0". Patented may s, |900. .1. szAFKA.

SURFACE GAGE.

(Application led Aug. 8, 1899.)

(No Model.)

PATENT rtree,

JOSEPH SZAFKA, OF PHILADELPHIA, PENNSYLVANIA.

su RFAcE-GAG E..

SPECIFICATION forming part of Letters Patent No. 649,011, dated May 8,1900.

Application led August 3, 1899. Serial No. 726,002. (No model.)

T0 @ZZ whom imag concern;

Be it known that I, JOSEPH SZ'AFKA, a cit-izen of the United States,residing at Philadelphia, in the county of Philadelphia and State' ofPennsylvania, have invented a certain new and useful Improvement in aCombined Surface-Gage and Scribe,of which the following is aspecification.

My invent-ion relates to a new and useful improvement in combinedsurface-gages and scribes, and has for its object to provide aneffective tool of this description which may be used for the variouspurposes for which such tools are used and which may be adjustedaccurately to allow for the great variety of positions and thus for theaccomplishment of various kindsy of work.

Vith these ends in view this invention consists in the details ofconstruction and combination of elements hereinafter set forth and thenspecifically designated by the claim.

In order that those skilled in the art to which this inventionappertains may understand howto make and use the same, the constructionand operation will now be described in detail,referrin g to theaccompanying drawings, forming a part of this specification, in which-Figure l is an elevation of a tool made in accordance with myimprovement; Fig. 2, a section at the line 2 2 of Fig. l upon a largescale, and Fig. 3 a section at the line 3 3.

In carrying out my invention as hereV embodied, A represents thebase-block, which is adapted to support the tool upon the surface i fromwhich the measurement is to be made,

and this block has formed therewith the lugs B, between which is pivotedthe rod C. In order that this rod may be adjustably held between thelugs, its lower end is enlarged, as indicated at F in Fig. 3, andthrough this enlargement and both of the lugs passes the bolt G, thethreaded end thereof having the nut Il run thereon, which is manipulatedby the pin I. This provides for the adjustment of the rod at any angleabove the horizontal in either direction and the securement thereof inthis adjustment by the binding of the nut, which will spring the lugstoward each other sufficiently to bind them against the enlargement F,as will bereadily understood.

A head J is mounted upon the rod so as to slide thereon and is heldinany adjustment by means of the'yoke K, located within the head andthrough which the rod passes, this yoke having a screw L formedtherewith, upon which is run the nut- M. Thus when this nut is properlymanipulated the screw and nut will be turned outward, thereby bindingthe latter tightly against the rod and holding the head againstanymovement. lVhen this yoke is loosened, the head will be free to slideup and down or be turned around the axis of the rod. A swinging hub N ispivoted to the head by the screw O, and the body of this screw hasformed thereon the worm-wheel P,`with which meshes the worm Q, thelatter being secu red within the hub by means of the pin R, as will bereadily understood, so as to have a revolving movement therein, but heldagainst withdrawal. Thus it will be seen that the manipulations of theworm Q by means of the thumb-knob S will bring about a swinging movementof the hub, since the worin-wheel is prevented from turning by the screwO being secured in place by the pin T. The hub has a segmentalslotUformed therein, through which a set-screw V passes, said screwbeing threaded into the head and provided with a shoulder W forbearingagainst the disk in such manner as to hold it in adjustment against lostmotion, which may take place between the worm-wheel and worm.

A gage-pointer X is secured to one side of the disk by its threaded endY being screwed into a corresponding socket, and the nose a' of thispointer may be turned and secured in any position by means of thejam-nut b, which is threaded upon the pointer-rod, as indicated at d,the said nut having suitable projecting handles for its manipulation.gage-pointer, the jam-nut is backed od by a slight turn when thepointer-rod has turned upon its axis to the desired position, afterwhich the jam-nut is again secured against the disk, and will thus holdthe gage-pointer in position.

e is the scriber-point, which is secured in the disk by its threaded endf being screwed in a corresponding socket, as clearly shown in Fig. 2.

The surface-block is adapted for use upon To adjust this "of Work in thesecurement thereof upon such machines.

Having thus fully described my improvement, what I claim as new anduseful is- In combination with a base and rod, a head `slidahle on therod a yoke ou the head through which the rod passes, a screw formed withthe yoke, a nut thereon engaging the head, a hub, a Worm-wheel having athreaded shank secured to the head, said Worm-Wheel having a head forholding the hub in place, a Worm secured in the hub and meshing With theworm- Wheel for rotating the hub on the Worm-Wheel, a set-screw passingthrough a segmental slot of the hub and threaded in the head and agage-pointer and a scribe-point threaded in the hub.

In testimony whereof I have hereunto affixed my signature in thepresence of two sub- JOSEPII SZAFKA.

, seribing Witnesses.

Witnesses z MARY E. HAMER, S. S. WILLIAMSON.

